Nah miss me with that high school ex bullshit. Her excuse is going to be some stereo typical nonsense like "i didn't know what I had" or "I realize my mistake after getting railed by assholes for the last ten years"
So wait, why is the manga using midgardsormen when the LN uses midgardsormr? I mean it's all the same thing in the end, but you know, semantics and all.